Four Seasons 85691 Engine Coolant Thermostat Housing

Overview of Four Seasons Thermostat Housing 85691

The Four Seasons Thermostat Housing 85691 is designed for reliable engine cooling system performance in select Ford vehicles. This integrated thermostat housing includes a thermostat and gasket, ensuring a complete solution for maintaining optimal engine temperature.

• Constructed from durable aluminum material
• Includes thermostat and gasket for easy installation
• Outlet port diameter: 44.450 mm
• Inlet port diameter: 1.490 inches
• Two mounting holes with 3.49 inches center-to-center spacing
• Flange thickness of 0.342 inches for secure fit
• Overall height of 1.992 inches
• Meets or exceeds OEM specifications
• Designed specifically for Ford E-350 Club Wagon, E-350 Super Duty, Excursion, F-250 Super Duty, and F-350 Super Duty models

About the Four Seasons Thermostat Housing Product Line

The Four Seasons Thermostat Housing product line focuses on integrated thermostat housings that combine the thermostat and housing into a single unit. This design simplifies replacement and helps maintain precise engine coolant regulation. The 85691 part number is part of this line, offering compatibility with various Ford Super Duty and E-350 models while meeting OEM standards for fit and function.

Detailed Product Description

This engine coolant thermostat housing is made from aluminum, providing strength and resistance to corrosion. The integrated thermostat housing style includes the thermostat and gasket, reducing the need for additional parts during installation. The housing features two mounting holes spaced 3.49 inches apart, ensuring a secure attachment to the engine. The outlet port diameter measures 44.450 mm, while the inlet port diameter is 1.490 inches, designed to match the cooling system specifications of compatible Ford vehicles. The flange thickness of 0.342 inches contributes to a tight seal and proper fitment. Overall height is 1.992 inches, accommodating the engine layout of the specified models.

Common Applications and Issues Addressed

• Replacement of worn or damaged thermostat housings in Ford E-350 Club Wagon and Super Duty trucks
• Resolving coolant leaks caused by cracked or corroded housings
• Addressing engine overheating due to faulty thermostat housing or thermostat failure
• Improving coolant flow and temperature regulation in Ford Excursion and F-250/F-350 Super Duty models
• Maintaining OEM-level performance and fit in engine cooling systems

Installation Notes and Tips

Before installation, ensure the engine is cool and the cooling system is depressurized. Remove the old thermostat housing carefully to avoid damaging surrounding components. Clean the mounting surface thoroughly to ensure a proper seal with the included gasket. Use the two mounting holes with 3.49 inches center-to-center spacing to secure the housing firmly. Verify the thermostat is correctly seated within the housing before tightening bolts. After installation, refill the cooling system and check for leaks during engine warm-up.

Quality Assurance and Warranty

The Four Seasons Thermostat Housing 85691 meets or exceeds OEM specifications, ensuring reliable performance and fitment. The aluminum construction offers durability and corrosion resistance. This part includes a thermostat and gasket to provide a complete replacement solution. Warranty details are provided by Four Seasons and typically cover defects in materials and workmanship under normal use.